8 



THE INORGANIC CONSTITUENTS OF M.4RINE INVEKTEHUATES. 



The two other analyses of corals, which were made some years ago in tlie Survey laboratory, 

 do not appear in the foregoing table because they are stated in somewliat different form. They 

 are, however, included in the following table of reduced analyses, in whicli the figures arc recal- 

 culated to 100 per cent and as definite salts, with organic matter and water rejected. The 

 two in question are as follows: 



29. Sidercisirea .sp. Bermuda; analy.sis by L. G. Eakins. 



30. Coral, species undetermined. Panama; analysis by W. T. Schaller. 



Reduced analyses of corals. 



13 



14 



15 



16 



17 



SiOs 0.09 



(Al,Fe),03 12 



MgCOa-'.. 37 



CaCO, 99-42 



CaSOj (?) 



CajPjOs Trace. 



100. 00 



100. 00 100. 00 100. 00 i 100. 00 



19 



20 



21 



22 



23 



SiOo 



(Al,Fe)..0. 



MgCO,.' 



CaCOa- 



CaSOi- 



Ca,PoO 



18 



100. 00 



24 



